物理化学学报 >> 1999, Vol. 15 >> Issue (01): 50-56.doi: 10.3866/PKU.WHXB19990110

研究论文 上一篇    下一篇

水滑石衍生复合氧化物的CO催化还原NO的性能

王学中, 刘玉敏, 吴越   

  1. 中国科学院长春应用化学研究所,长春 130022
  • 收稿日期:1998-03-20 修回日期:1998-07-27 发布日期:1999-01-15
  • 通讯作者: 吴越

Catalytic Reduction of NO by CO with Hydrotalcite Derived Mixed Oxides

Wang Xue-Zhong, Liu Yu-Min, Wu Yue   

  1. Changchun Institute of Applied Chemistry,Changchun 130022
  • Received:1998-03-20 Revised:1998-07-27 Published:1999-01-15
  • Contact: Wu Yue

摘要:

 研究了以含Co水滑石类化合物为前体、经焙烧制得的复合氧化物催化剂对CO催化还原NO的催化作用,结果表明,这样制得的催化剂的活性远远高于由传统方法制备的具有尖晶石结构的催化剂. 反应分步进行,NO先与CO反应生成N2O和CO2,随着反应温度的升高,最终得到的是N2和CO2,在所考察的催化剂中,反应活性随催化剂中Co含量的增加而升高,随焙烧温度的升高而降低,催化剂中晶格缺陷对活性有重要影响.

关键词: 水滑石类化合物, 尖晶石, 一氧化碳, NO的还原

Abstract:

Catalysts with spinel structure derived from Hydrotalcite-like Compounds (HTLcs) containing cobalt have been investigated in NO catalytic reduction by CO. It was found that catalysts with spinel structures derived from HTLcs had obviously higher activity than that prepared from general methods. A two-step reaction was observed during the reaction curse: NO was first reduced to N2O by CO, and with the increase of temperature, the N2O was reduced to N2. The reactivity of the catalysts studied increased with the amount of cobalt-content in the catalyst, and decreased with the calcination temperature. The crystal defect would play and important role in the reaction.

Key words: Hydrotalcite-like compounds, Spinel, CO, Reduction of NO